Could use map topography were the land is different heights would only need a few numbers to show the height of land. Anything low would be were water would be. Could also use valleys for dirty polluting industries to keep pollution away from housing etc. Could also have higher housing areas on mountains etc.
this doesn't works with the game engine I think. This game looks 3D, but it is 2D. you have only one layer. So I think this won't be added anytime
Its me Lego.